156121010021002 has 16 divisors (see below), whose sum is σ = 252198275277312. Its totient is φ = 72055051478640.

The previous prime is 156121010020993. The next prime is 156121010021023. The reversal of 156121010021002 is 200120010121651.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30911998 + ... + 35606089.

It is an arithmetic number, because the mean of its divisors is an integer number (15762392204832).

Almost surely, 2^{156121010021002} is an apocalyptic number.

156121010021002 is a deficient number, since it is larger than the sum of its proper divisors (96077265256310).

156121010021002 is a wasteful number, since it uses less digits than its factorization.

156121010021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66608373.

The product of its (nonzero) digits is 240, while the sum is 22.

Adding to 156121010021002 its reverse (200120010121651), we get a palindrome (356241020142653).

The spelling of 156121010021002 in words is "one hundred fifty-six trillion, one hundred twenty-one billion, ten million, twenty-one thousand, two".