1001211222021 has 8 divisors (see below), whose sum is σ = 1336078654944. Its totient is φ = 666908968560.

The previous prime is 1001211222017. The next prime is 1001211222131. The reversal of 1001211222021 is 1202221121001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1001211222021 - 2² = 1001211222017 is a prime.

It is a super-2 number, since 2×1001211222021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001211222421) 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 7 ways as a sum of consecutive naturals, for example, 141290731 + ... + 141297816.

It is an arithmetic number, because the mean of its divisors is an integer number (167009831868).

Almost surely, 2^{1001211222021} is an apocalyptic number.

It is an amenable number.

1001211222021 is a deficient number, since it is larger than the sum of its proper divisors (334867432923).

1001211222021 is a wasteful number, since it uses less digits than its factorization.

1001211222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282589731.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1001211222021 its reverse (1202221121001), we get a palindrome (2203432343022).

The spelling of 1001211222021 in words is "one trillion, one billion, two hundred eleven million, two hundred twenty-two thousand, twenty-one".