101021222121 has 16 divisors (see below), whose sum is σ = 137896704000. Its totient is φ = 65748186000.

The previous prime is 101021222087. The next prime is 101021222147. The reversal of 101021222121 is 121222120101.

It is not a de Polignac number, because 101021222121 - 2⁷ = 101021221993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101021222121.

It is not an unprimeable number, because it can be changed into a prime (101021222021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61996 + ... + 453746.

It is an arithmetic number, because the mean of its divisors is an integer number (8618544000).

Almost surely, 2^101021222121 is an apocalyptic number.

It is an amenable number.

101021222121 is a deficient number, since it is larger than the sum of its proper divisors (36875481879).

101021222121 is a wasteful number, since it uses less digits than its factorization.

101021222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393796.

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

Adding to 101021222121 its reverse (121222120101), we get a palindrome (222243342222).

The spelling of 101021222121 in words is "one hundred one billion, twenty-one million, two hundred twenty-two thousand, one hundred twenty-one".