142621202421 has 12 divisors (see below), whose sum is σ = 209083156672. Its totient is φ = 93661684776.

The previous prime is 142621202417. The next prime is 142621202447. The reversal of 142621202421 is 124202126241.

It is a happy number.

142621202421 is a `hidden beast` number, since 1 + 4 + 26 + 212 + 0 + 2 + 421 = 666.

It is not a de Polignac number, because 142621202421 - 2² = 142621202417 is a prime.

It is a super-2 number, since 2×142621202421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142621202411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118259101 + ... + 118260306.

Almost surely, 2^142621202421 is an apocalyptic number.

It is an amenable number.

142621202421 is a deficient number, since it is larger than the sum of its proper divisors (66461954251).

142621202421 is a wasteful number, since it uses less digits than its factorization.

142621202421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236519480 (or 236519477 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 142621202421 its reverse (124202126241), we get a palindrome (266823328662).

The spelling of 142621202421 in words is "one hundred forty-two billion, six hundred twenty-one million, two hundred two thousand, four hundred twenty-one".