1201022110021 has 4 divisors (see below), whose sum is σ = 1271670469452. Its totient is φ = 1130373750592.

The previous prime is 1201022110003. The next prime is 1201022110087. The reversal of 1201022110021 is 1200112201021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 933376260996 + 267645849025 = 966114^2 + 517345^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201022110021 - 2⁷ = 1201022109893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201022109983 and 1201022110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201022110091) 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, 35324179690 + ... + 35324179723.

It is an arithmetic number, because the mean of its divisors is an integer number (317917617363).

Almost surely, 2^{1201022110021} is an apocalyptic number.

It is an amenable number.

1201022110021 is a deficient number, since it is larger than the sum of its proper divisors (70648359431).

1201022110021 is an equidigital number, since it uses as much as digits as its factorization.

1201022110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70648359430.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1201022110021 its reverse (1200112201021), we get a palindrome (2401134311042).

The spelling of 1201022110021 in words is "one trillion, two hundred one billion, twenty-two million, one hundred ten thousand, twenty-one".