1211000020002 has 24 divisors (see below), whose sum is σ = 2761929870960. Its totient is φ = 382421058840.

The previous prime is 1211000019997. The next prime is 1211000020007. The reversal of 1211000020002 is 2000200001121.

It is an interprime number because it is at equal distance from previous prime (1211000019997) and next prime (1211000020007).

It is a Harshad number since it is a multiple of its sum of digits (9).

1211000020002 is a modest number, since divided by 20002 gives 12110 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1211000020007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1770467524 + ... + 1770468207.

It is an arithmetic number, because the mean of its divisors is an integer number (115080411290).

Almost surely, 2^{1211000020002} is an apocalyptic number.

1211000020002 is an abundant number, since it is smaller than the sum of its proper divisors (1550929850958).

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

1211000020002 is a wasteful number, since it uses less digits than its factorization.

1211000020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3540935758 (or 3540935755 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1211000020002 its reverse (2000200001121), we get a palindrome (3211200021123).

The spelling of 1211000020002 in words is "one trillion, two hundred eleven billion, twenty thousand, two".