1221012110004 has 24 divisors (see below), whose sum is σ = 2849053690560. Its totient is φ = 407000403264.

The previous prime is 1221012109979. The next prime is 1221012110023. The reversal of 1221012110004 is 4000112101221.

It is a congruent number.

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, 1181737 + ... + 1959215.

It is an arithmetic number, because the mean of its divisors is an integer number (118710570440).

Almost surely, 2^{1221012110004} is an apocalyptic number.

It is an amenable number.

1221012110004 is an abundant number, since it is smaller than the sum of its proper divisors (1628041580556).

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

1221012110004 is a wasteful number, since it uses less digits than its factorization.

1221012110004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908359 (or 908357 counting only the distinct ones).

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

Adding to 1221012110004 its reverse (4000112101221), we get a palindrome (5221124211225).

The spelling of 1221012110004 in words is "one trillion, two hundred twenty-one billion, twelve million, one hundred ten thousand, four".