21121141552156 has 24 divisors (see below), whose sum is σ = 37106630313984. Its totient is φ = 10519256036400.

The previous prime is 21121141552099. The next prime is 21121141552193. The reversal of 21121141552156 is 65125514112112.

It is a super-2 number, since 2×21121141552156² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 8473581 + ... + 10679131.

It is an arithmetic number, because the mean of its divisors is an integer number (1546109596416).

Almost surely, 2^{21121141552156} is an apocalyptic number.

It is an amenable number.

21121141552156 is a deficient number, since it is larger than the sum of its proper divisors (15985488761828).

21121141552156 is a wasteful number, since it uses less digits than its factorization.

21121141552156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214921 (or 2214919 counting only the distinct ones).

The product of its digits is 24000, while the sum is 37.

Adding to 21121141552156 its reverse (65125514112112), we get a palindrome (86246655664268).

The spelling of 21121141552156 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred forty-one million, five hundred fifty-two thousand, one hundred fifty-six".