421202021442 has 64 divisors (see below), whose sum is σ = 879665479680. Its totient is φ = 134300462400.

The previous prime is 421202021437. The next prime is 421202021459. The reversal of 421202021442 is 244120202124.

It is a happy number.

It is a super-2 number, since 2×421202021442² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10344159 + ... + 10384797.

It is an arithmetic number, because the mean of its divisors is an integer number (13744773120).

Almost surely, 2^421202021442 is an apocalyptic number.

421202021442 is an abundant number, since it is smaller than the sum of its proper divisors (458463458238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421202021442 is a wasteful number, since it uses less digits than its factorization.

421202021442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41319.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 421202021442 its reverse (244120202124), we get a palindrome (665322223566).

The spelling of 421202021442 in words is "four hundred twenty-one billion, two hundred two million, twenty-one thousand, four hundred forty-two".