401421012123 has 4 divisors (see below), whose sum is σ = 535228016168. Its totient is φ = 267614008080.

The previous prime is 401421012103. The next prime is 401421012127. The reversal of 401421012123 is 321210124104.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 401421012123 - 2¹⁴ = 401420995739 is a prime.

It is a super-2 number, since 2×401421012123² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401421012123.

It is not an unprimeable number, because it can be changed into a prime (401421012127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66903502018 + ... + 66903502023.

It is an arithmetic number, because the mean of its divisors is an integer number (133807004042).

Almost surely, 2^401421012123 is an apocalyptic number.

401421012123 is a deficient number, since it is larger than the sum of its proper divisors (133807004045).

401421012123 is a wasteful number, since it uses less digits than its factorization.

401421012123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133807004044.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 401421012123 its reverse (321210124104), we get a palindrome (722631136227).

The spelling of 401421012123 in words is "four hundred one billion, four hundred twenty-one million, twelve thousand, one hundred twenty-three".