1406645201021 has 4 divisors (see below), whose sum is σ = 1406776833792. Its totient is φ = 1406513568252.

The previous prime is 1406645200981. The next prime is 1406645201081. The reversal of 1406645201021 is 1201025466041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1406645201021 - 2³⁰ = 1405571459197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406645201081) 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, 65800355 + ... + 65821728.

It is an arithmetic number, because the mean of its divisors is an integer number (351694208448).

Almost surely, 2^{1406645201021} is an apocalyptic number.

It is an amenable number.

1406645201021 is a deficient number, since it is larger than the sum of its proper divisors (131632771).

1406645201021 is a wasteful number, since it uses less digits than its factorization.

1406645201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131632770.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 1406645201021 in words is "one trillion, four hundred six billion, six hundred forty-five million, two hundred one thousand, twenty-one".