121503451252 has 6 divisors (see below), whose sum is σ = 212631039698. Its totient is φ = 60751725624.

The previous prime is 121503451243. The next prime is 121503451259. The reversal of 121503451252 is 252154305121.

It can be written as a sum of positive squares in only one way, i.e., 88563379216 + 32940072036 = 297596^2 + 181494^2 .

It is a super-2 number, since 2×121503451252² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121503451259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15187931403 + ... + 15187931410.

Almost surely, 2^121503451252 is an apocalyptic number.

It is an amenable number.

121503451252 is a deficient number, since it is larger than the sum of its proper divisors (91127588446).

121503451252 is a wasteful number, since it uses less digits than its factorization.

121503451252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30375862817 (or 30375862815 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 121503451252 its reverse (252154305121), we get a palindrome (373657756373).

The spelling of 121503451252 in words is "one hundred twenty-one billion, five hundred three million, four hundred fifty-one thousand, two hundred fifty-two".