101211000021121 has 4 divisors (see below), whose sum is σ = 102636507063744. Its totient is φ = 99785492978500.

The previous prime is 101211000021083. The next prime is 101211000021127. The reversal of 101211000021121 is 121120000112101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101211000021121 - 2⁴⁵ = 66026627932289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101211000021127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712753521205 + ... + 712753521346.

It is an arithmetic number, because the mean of its divisors is an integer number (25659126765936).

Almost surely, 2^{101211000021121} is an apocalyptic number.

It is an amenable number.

101211000021121 is a deficient number, since it is larger than the sum of its proper divisors (1425507042623).

101211000021121 is an equidigital number, since it uses as much as digits as its factorization.

101211000021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425507042622.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 101211000021121 its reverse (121120000112101), we get a palindrome (222331000133222).

The spelling of 101211000021121 in words is "one hundred one trillion, two hundred eleven billion, twenty-one thousand, one hundred twenty-one".