121142201523 has 32 divisors (see below), whose sum is σ = 188679321600. Its totient is φ = 69108580800.

The previous prime is 121142201519. The next prime is 121142201533. The reversal of 121142201523 is 325102241121.

It is a happy number.

It is not a de Polignac number, because 121142201523 - 2² = 121142201519 is a prime.

It is a super-3 number, since 3×121142201523³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121142201493 and 121142201502.

It is not an unprimeable number, because it can be changed into a prime (121142201533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 520486 + ... + 716372.

It is an arithmetic number, because the mean of its divisors is an integer number (5896228800).

Almost surely, 2^121142201523 is an apocalyptic number.

121142201523 is a deficient number, since it is larger than the sum of its proper divisors (67537120077).

121142201523 is an equidigital number, since it uses as much as digits as its factorization.

121142201523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196512 (or 196498 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 121142201523 its reverse (325102241121), we get a palindrome (446244442644).

The spelling of 121142201523 in words is "one hundred twenty-one billion, one hundred forty-two million, two hundred one thousand, five hundred twenty-three".