1211021021132 has 24 divisors (see below), whose sum is σ = 2287730050032. Its totient is φ = 557605137600.

The previous prime is 1211021021129. The next prime is 1211021021149. The reversal of 1211021021132 is 2311201201121.

It is a happy number.

It is a super-2 number, since 2×1211021021132² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211021021132.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27637094 + ... + 27680877.

It is an arithmetic number, because the mean of its divisors is an integer number (95322085418).

Almost surely, 2^{1211021021132} is an apocalyptic number.

It is an amenable number.

1211021021132 is a deficient number, since it is larger than the sum of its proper divisors (1076709028900).

1211021021132 is a wasteful number, since it uses less digits than its factorization.

1211021021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55318409 (or 55318407 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1211021021132 its reverse (2311201201121), we get a palindrome (3522222222253).

The spelling of 1211021021132 in words is "one trillion, two hundred eleven billion, twenty-one million, twenty-one thousand, one hundred thirty-two".