1201010101021 has 4 divisors (see below), whose sum is σ = 1209650461600. Its totient is φ = 1192369740444.

The previous prime is 1201010101007. The next prime is 1201010101037.

1201010101021 is nontrivially palindromic in base 10.

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 1201010101021 - 2⁹ = 1201010100509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201010100989 and 1201010101007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201010141021) 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, 4320180081 + ... + 4320180358.

It is an arithmetic number, because the mean of its divisors is an integer number (302412615400).

Almost surely, 2^{1201010101021} is an apocalyptic number.

It is an amenable number.

1201010101021 is a deficient number, since it is larger than the sum of its proper divisors (8640360579).

1201010101021 is an equidigital number, since it uses as much as digits as its factorization.

1201010101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8640360578.

The product of its (nonzero) digits is 4, while the sum is 10.

It can be divided in two parts, 1201010 and 101021, that added together give a palindrome (1302031).

The spelling of 1201010101021 in words is "one trillion, two hundred one billion, ten million, one hundred one thousand, twenty-one".