1201012010021 has 4 divisors (see below), whose sum is σ = 1201245357312. Its totient is φ = 1200778662732.

The previous prime is 1201012009943. The next prime is 1201012010053. The reversal of 1201012010021 is 1200102101021.

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 1201012010021 - 2¹⁸ = 1201011747877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1201012009984 and 1201012010011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201012019021) 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, 116665925 + ... + 116676218.

It is an arithmetic number, because the mean of its divisors is an integer number (300311339328).

Almost surely, 2^{1201012010021} is an apocalyptic number.

It is an amenable number.

1201012010021 is a deficient number, since it is larger than the sum of its proper divisors (233347291).

1201012010021 is an equidigital number, since it uses as much as digits as its factorization.

1201012010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233347290.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1201012010021 its reverse (1200102101021), we get a palindrome (2401114111042).

The spelling of 1201012010021 in words is "one trillion, two hundred one billion, twelve million, ten thousand, twenty-one".