1200101202021 has 12 divisors (see below), whose sum is σ = 1688785072512. Its totient is φ = 757958653224.

The previous prime is 1200101201987. The next prime is 1200101202101. The reversal of 1200101202021 is 1202021010021.

It is not a de Polignac number, because 1200101202021 - 2¹³ = 1200101193829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200101201988 and 1200101202006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200101202121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 554062261 + ... + 554064426.

It is an arithmetic number, because the mean of its divisors is an integer number (140732089376).

Almost surely, 2^{1200101202021} is an apocalyptic number.

It is an amenable number.

1200101202021 is a deficient number, since it is larger than the sum of its proper divisors (488683870491).

1200101202021 is a wasteful number, since it uses less digits than its factorization.

1200101202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108126728 (or 1108126709 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1200101202021 its reverse (1202021010021), we get a palindrome (2402122212042).

The spelling of 1200101202021 in words is "one trillion, two hundred billion, one hundred one million, two hundred two thousand, twenty-one".