101231220015 has 32 divisors (see below), whose sum is σ = 183795701760. Its totient is φ = 52841257632.

The previous prime is 101231219981. The next prime is 101231220023. The reversal of 101231220015 is 510022132101.

It is not a de Polignac number, because 101231220015 - 2¹⁷ = 101231088943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101231220015.

It is a congruent number.

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, 7970899 + ... + 7983588.

It is an arithmetic number, because the mean of its divisors is an integer number (5743615680).

Almost surely, 2^101231220015 is an apocalyptic number.

101231220015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

101231220015 is a deficient number, since it is larger than the sum of its proper divisors (82564481745).

101231220015 is a wasteful number, since it uses less digits than its factorization.

101231220015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15954548 (or 15954542 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 101231220015 its reverse (510022132101), we get a palindrome (611253352116).

The spelling of 101231220015 in words is "one hundred one billion, two hundred thirty-one million, two hundred twenty thousand, fifteen".