101221101012 has 24 divisors (see below), whose sum is σ = 236815776736. Its totient is φ = 33649908768.

The previous prime is 101221101001. The next prime is 101221101013. The reversal of 101221101012 is 210101122101.

It is a super-2 number, since 2×101221101012² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221101013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11302618 + ... + 11311569.

Almost surely, 2^101221101012 is an apocalyptic number.

101221101012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

101221101012 is an abundant number, since it is smaller than the sum of its proper divisors (135594675724).

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

101221101012 is a wasteful number, since it uses less digits than its factorization.

101221101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22614567 (or 22614565 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 101221101012 its reverse (210101122101), we get a palindrome (311322223113).

The spelling of 101221101012 in words is "one hundred one billion, two hundred twenty-one million, one hundred one thousand, twelve".