1012210101 has 60 divisors (see below), whose sum is σ = 1769908140. Its totient is φ = 574801920.

The previous prime is 1012210099. The next prime is 1012210139. The reversal of 1012210101 is 1010122101.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12006225 + 1000203876 = 3465^2 + 31626^2 .

It is not a de Polignac number, because 1012210101 - 2¹ = 1012210099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012210201) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 717685 + ... + 719093.

It is an arithmetic number, because the mean of its divisors is an integer number (29498469).

Almost surely, 2^1012210101 is an apocalyptic number.

It is an amenable number.

1012210101 is a deficient number, since it is larger than the sum of its proper divisors (757698039).

1012210101 is a wasteful number, since it uses less digits than its factorization.

1012210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616 (or 1600 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1012210101 is about 31815.2495039721. The cubic root of 1012210101 is about 1004.0535799541.

Adding to 1012210101 its reverse (1010122101), we get a palindrome (2022332202).

The spelling of 1012210101 in words is "one billion, twelve million, two hundred ten thousand, one hundred one".