101221220120010 has 64 divisors (see below), whose sum is σ = 251449283232000. Its totient is φ = 26046889085952.

The previous prime is 101221220119973. The next prime is 101221220120021. The reversal of 101221220120010 is 10021022122101.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31190710 + ... + 34282689.

It is an arithmetic number, because the mean of its divisors is an integer number (3928895050500).

Almost surely, 2^{101221220120010} is an apocalyptic number.

101221220120010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101221220120010 is an abundant number, since it is smaller than the sum of its proper divisors (150228063111990).

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

101221220120010 is a wasteful number, since it uses less digits than its factorization.

101221220120010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65475215.

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

Adding to 101221220120010 its reverse (10021022122101), we get a palindrome (111242242242111).

The spelling of 101221220120010 in words is "one hundred one trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twenty thousand, ten".