1010211001221 has 16 divisors (see below), whose sum is σ = 1397048571648. Its totient is φ = 648784152000.

The previous prime is 1010211001193. The next prime is 1010211001249. The reversal of 1010211001221 is 1221001120101.

It is an interprime number because it is at equal distance from previous prime (1010211001193) and next prime (1010211001249).

It is not a de Polignac number, because 1010211001221 - 2¹⁸ = 1010210739077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1010211001197 and 1010211001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010211001271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45043245 + ... + 45065666.

It is an arithmetic number, because the mean of its divisors is an integer number (87315535728).

Almost surely, 2^{1010211001221} is an apocalyptic number.

It is an amenable number.

1010211001221 is a deficient number, since it is larger than the sum of its proper divisors (386837570427).

1010211001221 is a wasteful number, since it uses less digits than its factorization.

1010211001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90109052.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1010211001221 its reverse (1221001120101), we get a palindrome (2231212121322).

The spelling of 1010211001221 in words is "one trillion, ten billion, two hundred eleven million, one thousand, two hundred twenty-one".