1211202021104 has 40 divisors (see below), whose sum is σ = 2485171251360. Its totient is φ = 569879717888.

The previous prime is 1211202021103. The next prime is 1211202021137. The reversal of 1211202021104 is 4011202021121.

It is a super-2 number, since 2×1211202021104² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211202021101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1220372 + ... + 1977804.

It is an arithmetic number, because the mean of its divisors is an integer number (62129281284).

Almost surely, 2^{1211202021104} is an apocalyptic number.

It is an amenable number.

1211202021104 is an abundant number, since it is smaller than the sum of its proper divisors (1273969230256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211202021104 is a wasteful number, since it uses less digits than its factorization.

1211202021104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763337 (or 763331 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1211202021104 its sum of digits (17), we get a palindrome (1211202021121).

Adding to 1211202021104 its reverse (4011202021121), we get a palindrome (5222404042225).

The spelling of 1211202021104 in words is "one trillion, two hundred eleven billion, two hundred two million, twenty-one thousand, one hundred four".