102121234243012 has 6 divisors (see below), whose sum is σ = 178712159925278. Its totient is φ = 51060617121504.

The previous prime is 102121234242991. The next prime is 102121234243013. The reversal of 102121234243012 is 210342432121201.

It can be written as a sum of positive squares in only one way, i.e., 69216509565316 + 32904724677696 = 8319646^2 + 5736264^2 .

It is a super-2 number, since 2×102121234243012² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (102121234243013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12765154280373 + ... + 12765154280380.

Almost surely, 2^{102121234243012} is an apocalyptic number.

It is an amenable number.

102121234243012 is a deficient number, since it is larger than the sum of its proper divisors (76590925682266).

102121234243012 is a wasteful number, since it uses less digits than its factorization.

102121234243012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25530308560757 (or 25530308560755 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 102121234243012 its reverse (210342432121201), we get a palindrome (312463666364213).

The spelling of 102121234243012 in words is "one hundred two trillion, one hundred twenty-one billion, two hundred thirty-four million, two hundred forty-three thousand, twelve".