22101012 has 30 divisors (see below), whose sum is σ = 57777258. Its totient is φ = 7366896.

The previous prime is 22100959. The next prime is 22101029. The reversal of 22101012 is 21010122.

It can be written as a sum of positive squares in only one way, i.e., 17589636 + 4511376 = 4194^2 + 2124^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 22100985 and 22101003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 33783 + ... + 34430.

Almost surely, 2^22101012 is an apocalyptic number.

It is an amenable number.

22101012 is an abundant number, since it is smaller than the sum of its proper divisors (35676246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22101012 is a wasteful number, since it uses less digits than its factorization.

22101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68229 (or 68218 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 22101012 is about 4701.1713433994. The cubic root of 22101012 is about 280.6321262635.

Adding to 22101012 its reverse (21010122), we get a palindrome (43111134).

It can be divided in two parts, 2 and 2101012, that multiplied together give a palindrome (4202024).

The spelling of 22101012 in words is "twenty-two million, one hundred one thousand, twelve".