101621221212 has 24 divisors (see below), whose sum is σ = 270989923456. Its totient is φ = 29034634608.

The previous prime is 101621221201. The next prime is 101621221253. The reversal of 101621221212 is 212122126101.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 604888138 + ... + 604888305.

Almost surely, 2^101621221212 is an apocalyptic number.

101621221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

101621221212 is an abundant number, since it is smaller than the sum of its proper divisors (169368702244).

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

101621221212 is a wasteful number, since it uses less digits than its factorization.

101621221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209776457 (or 1209776455 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 101621221212 its reverse (212122126101), we get a palindrome (313743347313).

The spelling of 101621221212 in words is "one hundred one billion, six hundred twenty-one million, two hundred twenty-one thousand, two hundred twelve".