1021220100201 has 16 divisors (see below), whose sum is σ = 1571552293248. Its totient is φ = 577776576000.

The previous prime is 1021220100191. The next prime is 1021220100211. The reversal of 1021220100201 is 1020010221201.

It is an interprime number because it is at equal distance from previous prime (1021220100191) and next prime (1021220100211).

It is not a de Polignac number, because 1021220100201 - 2³⁸ = 746342193257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021220100211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240738120 + ... + 240742361.

It is an arithmetic number, because the mean of its divisors is an integer number (98222018328).

Almost surely, 2^{1021220100201} is an apocalyptic number.

It is an amenable number.

1021220100201 is a deficient number, since it is larger than the sum of its proper divisors (550332193047).

1021220100201 is a wasteful number, since it uses less digits than its factorization.

1021220100201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481480592.

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

Adding to 1021220100201 its reverse (1020010221201), we get a palindrome (2041230321402).

The spelling of 1021220100201 in words is "one trillion, twenty-one billion, two hundred twenty million, one hundred thousand, two hundred one".