101220100121 has 12 divisors (see below), whose sum is σ = 119503235088. Its totient is φ = 85465156392.

The previous prime is 101220100117. The next prime is 101220100127. The reversal of 101220100121 is 121001022101.

It is not a de Polignac number, because 101220100121 - 2² = 101220100117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101220100127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15412511 + ... + 15419076.

It is an arithmetic number, because the mean of its divisors is an integer number (9958602924).

Almost surely, 2^101220100121 is an apocalyptic number.

It is an amenable number.

101220100121 is a deficient number, since it is larger than the sum of its proper divisors (18283134967).

101220100121 is an equidigital number, since it uses as much as digits as its factorization.

101220100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30831668 (or 30831661 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101220100121 its reverse (121001022101), we get a palindrome (222221122222).

The spelling of 101220100121 in words is "one hundred one billion, two hundred twenty million, one hundred thousand, one hundred twenty-one".