1053621403421 has 16 divisors (see below), whose sum is σ = 1131545419776. Its totient is φ = 977568673536.

The previous prime is 1053621403411. The next prime is 1053621403427. The reversal of 1053621403421 is 1243041263501.

It is a cyclic number.

It is not a de Polignac number, because 1053621403421 - 2¹⁰ = 1053621402397 is a prime.

It is a super-2 number, since 2×1053621403421² (a number of 25 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 (1053621403427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1215221 + ... + 1893146.

It is an arithmetic number, because the mean of its divisors is an integer number (70721588736).

Almost surely, 2^{1053621403421} is an apocalyptic number.

It is an amenable number.

1053621403421 is a deficient number, since it is larger than the sum of its proper divisors (77924016355).

1053621403421 is a wasteful number, since it uses less digits than its factorization.

1053621403421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108668.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 1053621403421 its reverse (1243041263501), we get a palindrome (2296662666922).

The spelling of 1053621403421 in words is "one trillion, fifty-three billion, six hundred twenty-one million, four hundred three thousand, four hundred twenty-one".