101221111132154 has 32 divisors (see below), whose sum is σ = 165312304206336. Its totient is φ = 46205301536640.

The previous prime is 101221111132051. The next prime is 101221111132177. The reversal of 101221111132154 is 451231111122101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51464462 + ... + 53395065.

It is an arithmetic number, because the mean of its divisors is an integer number (5166009506448).

Almost surely, 2^{101221111132154} is an apocalyptic number.

101221111132154 is a deficient number, since it is larger than the sum of its proper divisors (64091193074182).

101221111132154 is a wasteful number, since it uses less digits than its factorization.

101221111132154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104859950.

The product of its (nonzero) digits is 480, while the sum is 26.

Adding to 101221111132154 its reverse (451231111122101), we get a palindrome (552452222254255).

The spelling of 101221111132154 in words is "one hundred one trillion, two hundred twenty-one billion, one hundred eleven million, one hundred thirty-two thousand, one hundred fifty-four".