101221221210 has 16 divisors (see below), whose sum is σ = 242930930976. Its totient is φ = 26992325648.

The previous prime is 101221221151. The next prime is 101221221307. The reversal of 101221221210 is 12122122101.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 101221221210.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1687020324 + ... + 1687020383.

It is an arithmetic number, because the mean of its divisors is an integer number (15183183186).

Almost surely, 2^101221221210 is an apocalyptic number.

101221221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101221221210 is an abundant number, since it is smaller than the sum of its proper divisors (141709709766).

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

101221221210 is a wasteful number, since it uses less digits than its factorization.

101221221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374040717.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 101221221210 its reverse (12122122101), we get a palindrome (113343343311).

The spelling of 101221221210 in words is "one hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred ten".